Final answer:
Derailed managers are individuals who were successful in their early careers but faced obstacles when reaching middle to upper levels of management.
Step-by-step explanation:
The managers described in the question are known as derailed managers. These individuals were successful in their early careers but faced obstacles that prevented them from advancing to higher levels of management. This can be due to various reasons such as organizational changes, lack of necessary skills, or personal challenges.
One example of a derailed manager is someone who excelled as a project manager but struggled when promoted to a higher-level position requiring different skills, such as strategic planning or stakeholder management. Organizations can support derailed managers by providing additional training and development opportunities, offering mentorship programs, or creating career advancement paths that align with their skills and strengths.